The palatoglossus muscle functions to elevate the posterior portion of the tongue. It also draws the soft palate inferiorly, thereby narrowing the diameter of the oropharyngeal isthmus.
What does the palatoglossus innervation?
It innervates the throat muscles with SVE fibers of the glossopharyngeal and vagus nerves. Its glossopharyngeal innervation is to stylopharyngeus, which elevates the pharynx during speech and swallowing, and its vagal innervation is to the pharynx, larynx, select palatine muscles, and one tongue muscle: palatoglossus.
What does the palatopharyngeus do?
It attaches superiorly to the hard palate and palatine aponeurosis and inferiorly to the lateral wall of the pharynx. Its function is to tense the soft palate and pull the pharyngeal walls superiorly, anteriorly, and medially during swallowing, effectively closing off the nasopharynx from the oropharynx.
Why is it called palatoglossus?
Origin of the Palatoglossus
As just mentioned, the palatoglossus muscle is an extrinsic muscle of the tongue, which means this muscle originates from outside the tongue. Specifically, the palatoglossus muscle originates from the bottom surface of the palatine aponeurosis.
What does the Mylohyoid muscle do?
The mylohyoid mainly functions to elevate the hyoid bone, elevate the oral cavity, and depress the mandible.
What are Faucial pillars made of?
The posterior faucial pillar is formed by the palatopharyngeal muscle. It originates from the posterolateral part of the soft palate and runs downward and laterally to insert into the pharyngeal constrictor muscle and the thyroid cartilage of the larynx.
What is the hyoglossus muscle?
The hyoglossus muscle is one of the four intrinsic muscles of the tongue. It is a quadrilateral muscle that originates along the whole length of the hyoid bone and inserts into the side of the tongue. The hyoglossus acts to both depress and retract the tongue.
What is the styloglossus muscle?
The styloglossus muscle is a paired extrinsic muscle of the tongue. It coordinates with the other extrinsic muscles of the tongue, including the hyoglossus muscle, the genioglossus muscle, and the palatoglossus muscle, to produce the various movements of the tongue.
What Innervates the palatopharyngeus muscle?
Innervation. The muscle receives motor innervation from the cranial portion of the accessory nerve (CN XI). This occurs via the pharyngeal plexus with branches from the vagus nerve (CN X) and glossopharyngeal nerve (CN IX).
Is palatopharyngeus paired?
The palatopharyngeus muscle is a muscle of the head and neck, and one of the inner longitudinal muscles of the pharynx. It is also referred to as one of the five paired muscles of the soft palate. The paired muscles create ridges of mucous membrane in the lateral pharyngeal wall called the palatopharyngeal arches.
Where is palatopharyngeus muscle?
The palatopharyngeus is a muscle of both the soft palate and the pharynx. Anteriorly, the muscle fibers are attached to the hard palate, and posterior fibers are attached to the palatine aponeurosis. The anterior portion of the muscle is separated by the levator veli palatini (LVP).
What is the origin of styloglossus muscle?
The styloglossus muscle is an extrinsic muscle of the tongue, and its origin in the styloid process of the temporal bone is well documented.
What does CN 9 do?
The glossopharyngeal nerve is the ninth set of 12 cranial nerves (CN IX). It provides motor, parasympathetic and sensory information to your mouth and throat. Among its many functions, the nerve helps raise part of your throat, enabling swallowing.
